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Bioelectrical Impedance Analysis Notes on Interpretation of Obese Patients |
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Obesity presents a different expected value for “normally obese” body composition. In the best cases, compensatory muscle gain holds and immobility does not set in. To a dietitian, a goal might be set for weight loss. However, even if the client remains obese, at more than 130% of their ideal body weight, a reasonable goal is to maintain an additional buffer of body cell mass. |
| To figure an appropriate level of body cell mass (except possibly in the severely obese), adjusted obese weight can be substituted for ideal body weight in calculating goals. Figure 3. shows the calculation for adjusted obese weight (AOW). The results of calculations for body compartments as a percentage of body weight is shown in Table 8. In evaluating obese clients, trending of data is likely to be ultimately more useful than your initial report and comparison to a reference value. Please note that this calculation is not reflected in RJL's Fluid and Nutrition Analysis (FNA) software | |
Figure 3. Calculations for Adjusted Obese Weight (AOW)
| AOW = [(CBW – IBW) x 0.25] + IBW |
IBW = ideal body
weight; CBW = current body weight.
Table 8. Reference Values for Body Compartments
|
Body Compartment |
Men |
Women |
| Body Cell Mass (BCM) | 39-45% of IBW or AOW | 30-36% of IBW or AOW |
| Extracellular Mass (ECM) | 39-45% of CBW | 37-44% of CBW |
| Fat Mass | 10-22% of CBW | 20-32% of CBW |
IBW = ideal body weight; AOW = adjusted obese weight; CBW = current body weight.
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